Wireless relay



Feb. 24, 1925. 1,527,933

L. C. STAAB WIRELESS RELAY Filed Oct. 10, 1921 2 h tsheet 2 INVENTDR WITNESS:

ATTORNEY Patented Feb. 24, 1925.

UNITED STATES LOUIS C. STAAB, OF LEIGH, NEBRASKA.

WIRELESS RELAY.

Application filed October 10, 1921.

To all whom it may concern:

Be it known that I, LoUIs C. STAAB, a citizen of the United States, residing at Leigh, in the county of Colfax and State of Nebraska, have invented new and useful Improvements in lVireless Relays, of which the following is a specification.

This invention relates to wireless telegraphy, particularly to receiving mechanism, and has for its object the provision of a novel automatic relay device adapted for interposition in a receiving circuit where by signals received may be relayed to any desired point.

An important object is the provision of a relay device which includes a moving coil operating between the poles of a permanent magnet and arranged, when deflection occurs, to close a circuit through a signal device, such as a bell, buzzer, or the like, a source of current of course being interposed in the local circuit including the signal.

Another object is the provision of a relay of this character which is provided with means whereby its sensitiveness will be varied so that a greater or less deflection of the moving coil will be required to close the local circuit.

An additional object is the provision of a mechanism of this character which will be simple and inexpensive in manufacture, easy to install and correlate with receiving apparatus, efficient and positive in action, durable in service, and a general improve ment in the art.

WVith the above and other objects and advantages in view, the invention consists in the details of construction to be hereinafter more fully described and claimed and illustrated'in the accompanying drawings in which:

Figure 1 is a front elevation of my relay device with the cover removed.

Figure 2 is a vertical sectional view therethrough.

Figure 3 is a perspective view of one of the contact arms, and

Figure 4 is a diagram of the complete electrical circuit showing my mechanism interposed in a wireless receiving apparatus.

Referring more particularly to the drawings, I have shown my relay as comprising a suitable enclosing casing 10 which may be formed of any suitable material and which is illustrated as being circular, though it Serial No. 506,621.

is to be understood that any other shape might be used, if preferred. This casing is covered by a. plate 11 preferably provided with a cut-out portion 12 of the proper shape covered with transparent material 13. Secured within this casing is a permanent magnet 14 of horse-shoe type having pole pieces 15 between which is disposed an armature 16 of suitable material mounted upon a spindle 17 having its ends terminating in sharp points journaled in the concaved ends of bearing screws 18 which are threaded through bars 19 and 20 which are secured upon and insulated from the front and back of the magnet, respectively. This mounting is similar to the mounting of the balance wheel of a watch or clock and the similarity is further enhanced by the provision of a hair'spring 21 which has one end secured to the spindle and which has its other end secured to an arm 22 formed on a disk 23 which is rotatably mounted upon the bar 19 by the screw 18 passing therethrough. The disk is held in adjusted position by means of very small screws 24 which pass through arcuate slots 25 in the disk and which are threaded into the bar 19. By this construction it will be seen that the tension of the hair spring may be varied at will so that various different conditions may be met.

The bars 19 and 20 are held in proper spaced relation to the magnet, or the pole pieces thereof, by means of screws 26 and 27 which pass through insulating sleeves 28 and through the bars and into the magnet or pole pieces. Connected with one of the screws 26 and one of the screws 27 are wires 29 and 30, respectively, which are connected with terminals 31 and 32 on the outside of the casing. Also connected with these terminals are flexible conducting cords 33 which carry a telephone plug 34 of ordinary construction.

Carried by the armature 16 and surrounding the same from end to end thereof, is a rectangular elongated loop-like supporting frame 35 which is secured for rotation therewith and which carries one or more convolu tions of wire 36 of the size found most advantageous. One end of the wire 36 is connected with a small collar 37 secured upon and insulated from one end of the spindle 17, while the other end of the wire is connected with a small collar 38 secured upon and insulated from the other end of the spindle and bearing against the bar 20. In this way it will be seen that current passing through the terminals 31 and 32 will-also pass through the wire 36, the collarsn37 and 38, and through both bars 19 and 20. Extending from the collar 37 is an arm.3.9 for a purpose to be described. Secured upon some convenient location on the magnet 14 is a supporting bracket 40 upon which are secured and insulated from the'bracket'and from each other, spring contact arms 41 and 42, the former of which carries a platinum contact point 43'and the latteroi which carries a silver. contact 44. The free endof the contact arm 41' is extended at right angles as shown" at 41 and carriesa hard rubber roller'41 engaging, the arm 39 and moved thereby. Pivoted upon the cover plate 11 ofthercasing isan arm 46-having an angular endi-engagingthe'contact'arm 42 and provided exteriorly of the cover plate with'an operating knob 47.

Gonnected'with the contact arms 41 and 42 are wires48 and 49, one ofwhich is connected with a buzzer, bell", or other signaling device, indicatedat 50, and the other of which is connected with one pole of a source of current 51 which has its other pole connected with the signal 50."

Inthe useof my device, it is of course possible that it be interposed in any one of" many varieties of receiving mechanisms or' circuits, though in actual practice I prefer to associate it with a receivingstati on including the usual detector'circuit with which is associated two properly connected amplifiers, preferably of the De Foresttype. In, thediagrammatic view ofthe complete circuit showing my apparatus in use, I have illustrated the ordinary detector circuit and two of. such amplifiers associated "therewith and connected. with the usualsources of current. These elements or arrangements of wireless receiving apparatus are so well known that it is believed that a detailed. description thereof is superfluous infview of the diagram. Sufli'ce to say that the ordinary detector circuit is indicated by the letter A and connected in this circuit by a jack/B is the first amplifier- C to which is connected, by a second jack D, the second amplifier E which is likewise provi'dedwith the ack F.

In the actual use'of my device the plug is'inserted in the: jackF, whereup on it will be seen that when a signal isreceived at the receiving station comprised by, the circuitA .and the amplifiers C and E, current will pass through the: terminals 31 and 32, bars 19 and 20, and'through the wire 36 "which surrounds the armature of my relay device. The passage; of current through this wire co1l.36' of'course inducesa current which sets up a" magneticfiel'd" having' a" the contact arm 42 and this will of course result in engagement of the platinum contact point 43 with the silver contact 44 and this will of course close the local circuit through the source of current 51, wires-48 and 49' and signal 50 'so that the latter will be. operated. This action will not in any way detract from. the-local efficiency of the receiving app'aratus'as 'only an infinitesimal amount of current is requiredflto pass through the coil 36-. After current'ceases to flow'through the coil 36, itis'of courseapparent'that thecont'act' arm 41 will return to normal position owing to its 1 inherent resilience andthearmature and coil will return to neutral position by-virtueof the hair spring 21. By rotatingthe knob 47 the arm 46 may be moved so as 'to'vary the position of the contactarm 42' with respect to the contact arm 4'1so' as tovarythe sensitiveness of the mechanism. In thisway it willbe seen that the device'm'ay be rendered' accurate and sensitive under-widely varying conditions.

From the foregoing description and a study, of the drawings it ill be'apparent that I have thus provided asimply constructed relay which may bereadily interposed in an ordinary; receiving station whereby fluctuations in the local circuits under the influence of wireless waves may becausedto close a local circuit associated with a signal device with any ordinary or preferredtype located at any point with respect to the wireless receiving apparatus. It to be noted that I' have provided ample means foradj ustiiig the sensitiveness of T my relay so. that it may be usedsuccessfully under varying conditions 'Whi'leI have shown and described the preferred embodiment of my invention,- it is of course to be understood that"I reserve the right to make such changes in theform, construction 77 and arrangement of 'parts as will not depart from the's'pirit of' the invention or the scope ofthe sub joined claims.

:What is claimed is'z 1. In a relay device, a permanent magnet, an armature journaled between the poles thereof, a coil wound aroundfsaidfarmature longitudinally thereof and, having" its terminalsadapted for connection" in a circuit, V.

the statibna rycontact;arotatablyadjustable arm member engaging said relatively stationary contact for regulating the position thereof.

2. In a relay device, a permanent magnet, an armature journaled between the poles thereof, a coil Wound around said armature longitudinally thereof and having its terminals adapted for connection in a circuit, a stationary spring contact, a movable contact for cooperation with said relatively stationary contact, an arm projecting from the armature and engageable with said movable contact for moving the same toward the stationary contact, a rotatably adjustable arm member engaging said relatively sta- 1 initial position of the movable cont-act with 20 respect to the stationary contact.

In testimony whereof I aflix my signature.

LOUIS C. STAAB. 

